Deburring device



March 15, 1966 A` M SAMUELS ETAL 3,240,088

DEBURRING DEVICE Filed Jan. 14, 1964 2 Sheets-Sheet 1 March 15, 1966 A-M SAMUELS ETAL `3,240,088

DEBURRING DEVICE Filed Jan. 14, 1964 2 Sheets-Sheet 2 United StatesPate-nt 3,240,088 DEBURRING DEVICE Abraham M. Samuels, Chicago, andEugene B.Shapiro,

Skokie, Ill., assiguors to Chicago Specialty Manufacturing Co., Skokie,Ill., a corporation `of Illinois Filed Jan. 14, 1964, Ser. No. 340,582Claims. (Cl.`824) This invention relates to a tubedeburring device.

One of the objects of this invention is toprovide a tube deburringdevice which is highly etl'icient in operation.

Another object of this invention is to provide `a tube cutting devicehaving meansfor simultaneously deburring the tube `surface during thecutting operation,

This application is a continuation-impart of our copendingapplicationled September 19, 1961, Serial No. 139,156 now Patent No.3,118,227 issued January `2l, 1964.

In the normal `use of tube cutting tools, burrs are formed on thesurface ofthe tube at the point where the cutting wheel engages the tubeor adjacent thereto, therefore, after the tube has been severed ithas tobe treated and/ or handled to removethe burrs before the end of the tubecan be coupled or jointed to attting. 'The burred surfaces woldotherwise increase the outside diameter of the severed tubefandunlessthe burrs are removed the end of the tube cannot t into theappropriate fitting. This additional handling and treatment of thecuttube"for this purpose takes additional time .and adds to the expense.With thisinvention this isentirely eliminated as the unit forming thisinvention is provided with a deburring element which operates againstthe tube surface while the cutting takes place so that as the cuttingwheel operatesto cut and thereby form burrson thetubesurface, the tubeis in engagement with the deburring` element on the opposite -side'ofthe cutting wheel to deburrthe said surface, so that after the tubeissevered the deburring `has been completed.

`Another object-of this invention is to` provide a tooll of theforegoing character which is easy and quick to manipulate and wherein anumber of operations, namely, cutting and deburring simultaneouslytakeplace, resulting in econornies` not heretofore attained.

Other objects and advantages will becomeapparent` as this descriptionprogresses.

In the drawings: FIG. l is a side elevational view ofiat-ube cutting anddeburring tool embodying this invention;

FIG. 2 is a plan View of the tool lookingupwardlyas viewed in FIG. 1;

FIG. 3 is a view partly in section taken on lines `3--3 of FIG. l;

FIG. 4 is a sectional View taken onlines `4--4 of FIG. 3;

FIG. 5 is a sectional view taken on line 5 5 of FIG. 4;

FIG. 6 is an enlarged View partly insection taken on line 6-6 of FIG. 2;

FIG. 7 is a sectional view taken on line 7--7 'of FIG.

`direction away from the tube'to be cut.

f3,240,088 Patented Mar. 15, 1966 ice deburring unit generallydesignated at 20 and best shown in FIGS. 4, 5 and 8.

threaded stem is fixedly secured as at 24 to a knob 25 for rotating saidstem. The exterior surface of the bearing Vend 14 Vof the frame isrecessed as at 26 to accommodate the4 knob V25.

Extending outwardly of the surface of the bearing end 14 within therecessed portion 26 is an annular exten- 'sion or annular ilange 28. Theknob 25 has an annular recess 27 to accommodate the annular flange 28when the knob is rotated inwardly.

The opposite end of the threaded stem 22 has a reduced diameter as at 30and has an annular groove 32 (FIGS. 4 and 5). The deburring unit 20,best shown in FIG. 8, is mounted on the end of the threaded stem. Thedeburring unit 20 includes a plate 34`having teeth or cutting edges 36arranged at substantially 30 in relation to thelongitudinal axis of thetube T to be cut and deburred. The teeth or cutting edges extendparallel to each other and each tooth or cutting edge is generallytriangularin shape, withtheincluded angle at the apex of each toothbeing substantially The deburring plate is located on' the. center lineof the tube T and this, together with the larrangement of the teethpermits the tool 10 to be rotated clockwise -or counterclockw-ise toaccomplish the deburring. Most -of the teeth or cutting edges 36 oftheplate `34 are simultaneously in engagement with the tube'T and `eachtooth is in engagement with the tube T along the `length of the tooth orcutting edge 36. The tooth or cut- -to either-side of theportion of thetube where the cutting of-t the tube takes place, namely, the diagonallyextending teeth 36 span and extend across the groove formed by thecutting -wheel on'the tube, which will be hereinafter described.

The plate 34 is secured to or formed integrally with a rectangularshaped block 37, having anannularrecess 38 opening rearwardly toaccommodate the reduced end 30 of the threaded `stem `22. A pin'40 isthreadedly secure in the block 37 and `said pin has a reduced end `toseattwithin the groove 32 so that the stem 22is rotatable with respectto `the block 37 and deburring `element t thereon.

To prevent rotation of the deburring unit 20, a guide pin 42 is usecuredat one end to the block 37,with the `opposite end of the pin slidinglypassing through opening positioned between therollers 18. The deburringunit here describedpermits the tool to be rotated clockwise orcounterclockwisewith respect to the tube T and permits the cutting anddeburring to take place when rotated in either of said directions.

A-spring biased arm is mounted'on the frame. Said arm carries thecutting unit and is normally biased in a For example, the `arm 46 vispivotally supported on a pin 48 which `is anchored in the frame 12 andthe arm is secured tosaid `pin inside the channel walls of the frame Thebase of the arm has anose 47. The arm 46 is channel shaped incross-section `and a spring 50 has a coil 51 wrapped aroundthe pin 48,with one end 52 of the spring resting against the inside of the frame 12and the opposite end 53 of the spring resting against the arm 46 andconfined in an opening 54 formed in a web 56 of the arm. The spring 50normally biases the arm 46 to the right, as

`knob 86 for rotating the shaft.

viewed in FIG. 1, or in a direction away from the tube T to be cut.

The cutting unit generally indicated at 57 has a central blade 58 withbosses 59 on the opposite sides of the blade, all preferably formed asan integral unit. The cutting unit has a transverse opening 60 andisfreely rotatably mounted on a pin 62 supported by the spaced walls 49 ofthe channel shaped arm 46 at the outer end of arm 46.

The side of the frame 12 opposite the bearing end 14 is provided with anintegral boss or collar portion 64 (FIG. 6) having a substantiallycircular opening 66 extending therethrough in the direction of therollers 18. The opening 66 slidably receives a shaft 68 provided withbuttress threads 70.

The boss or collar 64 has a rectangular shaped recess 72 in which a pawlor trigger 74 is pivotally mounted. The pawl or trigger 74 is pivotallysupported on a pin 76 which is secured to the boss 64, with the triggerpositioned between the vertical side walls of the recess 72. The triggeror pawl 74 has an extension 78 which passes through an opening 80 in theboss 64 of the frame. The extension 78 has a threaded surface 82 withteeth complementary to the buttress threads 70, as best shown in FIG. 6,for engagement with the buttress threads. A coil spring 84 is positionedin the recess 72 between the underside of the finger end of the triggerand the boss and surrounds an anchoring member 85 on the trigger for thepurpose of normally biasing the trigger or pawl 74 so that the teeth 82of the trigger are in engagement with the buttress threads 70, as seenin FIG. 6.

One end of the threaded shaft 68 has fixed thereto a The other end has ahead 87 adapted to engage the curved outer surface of the arm 46 for thepurpose of moving the arm 46 in a direction towards the rollers 18. Thehead 87 is mounted on the shaft 68 so that the shaft is rotatable withrespect to the head.

The inside of the channeled frame 12 between the arm 46 and the rollers18 provides a storage space for holding an extra cutting wheel 57 in outof the way position. A threaded bolt 89 passes through the opening inthe extra cutting unit and is threadedly secured to the frame for suchpurpose.

It will be seen that the arm 46 carrying the cutting wheel is normallybiased in a direction away from the tube T to be cut, however, theposition of the threaded shaft 68 limits the rearward position of thearm 46. The tube T is positioned between the rollers 18 and the arm 46carrying the cutting Wheel 57. The buttress threaded shaft 68 may beadvanced forwardly towards the arm 46 by rotating the threaded shaft 68,which'is in engagement with the threads 82 of the trigger or pawl 74, orif a more rapid advance of the threaded shaft 68 is desired, thethreaded shaft 68 is pushed forwardly, and due to the buttress threads70 and the threads 82 on the trigger or pawl 74 this is possible.

To retract the threaded shaft 68 and move the arm 46 and cutting unit 57away from the tube T, the threaded shaft is rotated in the reversedirection, provided the trigger or pawl 74 is in engagement with thethreaded shaft, as shown in FIG. 6,. However, if a rapid retracting isdesired it is effected by engaging the trigger 74 manually and pivotingsame on pin 76 so that the teeth 82 of the trigger are disengaged fromthe buttress threads 70 of the shaft. When this occurs the spring biasedarm 46 will push the threaded shaft 68 outwardly or to the right, asshown in FIG. l, until the trigger 74 is manually released to engage thebuttress threads or until the shaft 68 reaches the end of its rearwardmovement, as when the head 87 engages the frame 14. Moving the threadedshaft inwardly towards the rollers 18 will cause the arm 46 to pivotforwardly and movement of the threaded member outwardly will cause thearm 46 to pivot rearwardly due to the spring 50.

As is well understood, the tube T to be cut is clamped in position on aclamping device, not shown, and the tool 10 is positioned with respectto the tube, as shown in FIG. 1. The deburring unit 20 is adjusted andas the tool is rotated about the tube, the cutting wheel 58 is cuttinginto the tube T while the deburring unit 20 is shaving off the burredsurface B of the tube adjacent the opposite edges of the groove formedby the cutting wheel on the tube. As the cutting wheel cuts deeper intothe tube, the deburring unit 20 may be adjusted towards the tube byrotating the knob 2S to remove the burrs formed on the tube at thecutting surface.

The cutting and deburring takes place simultaneously so that after thetube has been severed the two severed ends of the tube are completelydeburred and may be jointed or coupled to fittings without requiring anyfurther treatment of the severed ends.

It will be understood that various changes and modications may be madefrom the foregoing without departing from the spirit and scope of theappended claims.

What is claimed is:

1. A tube deburring device comprising a frame, rollers journaled in theframe for contacting the tube to be deburred, a deburring memberpositioned between said rollers and supported by said frame, saiddeburring member having a plurality of spaced parallel diagonallyextending cutting surfaces simultaneously in contact with the portion ofthe tube to be deburred, said diagonally extending cutting surfacesengaging the tube diagonally.

2. A structure defined in claim 1 in which the cutting surfaces arearranged substantially 30 in relation to the tube to be deburred.

3. A structure defined in claim 1 in which the cutting surfaces are eachof substantially triangular shape, with the included angle at the apexof each cutting surface being substantially 90.

4. A structure defined in claim 1 having means for adjusting thedeburring member in relation to the tube and means for preventingrotation of said deburring member during said adjustment.

5. A device comprisingna frame, rollers journaled in the frame forcontacting the tube to be cut and deburred, an arm pivotally mounted onsaid frame, a cutter wheel supported on said arm for cutting the tube, adeburring member positioned between said rollers and supported by saidframe, said deburring member having a plurality of spaced paralleldiagonally extending cutting surfaces simultaneously in contact with theportion of the tube to be deburred, said diagonally extending cuttingsurfaces engaging the tube diagonally.

References Cited by the Examiner UNITED STATES PATENTS 1,092,304 4/ 1914Strickler 82-4 X 1,193,853 8/1916 White 82-4 X 1,484,023 2/ 1924 Hayter82-4 X 1,499,939 7/ 1924 Linders 82-4 1,758,521 5/1930 Kerrigan 82-4 X1,983,922 12/1934 Ruppel 82--4 2,129,253 9/1938 Willis 824 FOREIGNPATENTS 531,596 10/1921 France.

WILLIAM W. DYER, IR., Primary Examiner.

HARRISON L. HINSON, Examiner,

1. A TUBE DEBURRING DEVICE COMPRISING A FRAME, ROLLERS JOURNALED IN THEFRAME FOR CONTACTING THE TUBE TO BE DEBURRED, A DEBURRING MEMBERPOSITIONED BEWTEEN SAID ROLLERS AND SUPPORTED BY SAID FRAME, SAIDDEBURRING MEMBER HAVING A PLURALITY OF SPACED PARALLEL DIAGONALLYEXTENDING CUTTING SURFACES SIMULTANEOUSLY IN CONTACT WITH THE PORTION OFTHE TUBE TO BE DEBURRED, SAID DIAGONALLY EXTENDING CUTTING SURFACESENGAGING THE TUBE DIAGONALLY.